passes/pmgen/peepopt.cc

   1 /*
   2  *  yosys -- Yosys Open SYnthesis Suite
   3  *
   4  *  Copyright (C) 2012  Clifford Wolf <clifford@clifford.at>
   5  *
   6  *  Permission to use, copy, modify, and/or distribute this software for any
   7  *  purpose with or without fee is hereby granted, provided that the above
   8  *  copyright notice and this permission notice appear in all copies.
   9  *
  10  *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  *
  18  */
  19
  20 #include "kernel/yosys.h"
  21 #include "kernel/sigtools.h"
  22
  23 USING_YOSYS_NAMESPACE
  24 PRIVATE_NAMESPACE_BEGIN
  25
  26 bool did_something;
  27
  28 #include "passes/pmgen/peepopt_pm.h"
  29
  30 struct PeepoptPass : public Pass {
  31         PeepoptPass() : Pass("peepopt", "collection of peephole optimizers") { }
  32         void help() YS_OVERRIDE
  33         {
  34                 //   |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
  35                 log("\n");
  36                 log("    peepopt [options] [selection]\n");
  37                 log("\n");
  38                 log("This pass applies a collection of peephole optimizers to the current design.\n");
  39                 log("\n");
  40         }
  41         void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
  42         {
  43                 log_header(design, "Executing PEEPOPT pass (run peephole optimizers).\n");
  44
  45                 size_t argidx;
  46                 for (argidx = 1; argidx < args.size(); argidx++)
  47                 {
  48                         // if (args[argidx] == "-singleton") {
  49                         //      singleton_mode = true;
  50                         //      continue;
  51                         // }
  52                         break;
  53                 }
  54                 extra_args(args, argidx, design);
  55
  56                 for (auto module : design->selected_modules()) {
  57                         did_something = true;
  58                         while (did_something) {
  59                                 did_something = false;
  60                                 peepopt_pm pm(module, module->selected_cells());
  61                                 pm.run_shiftmul();
  62                                 pm.run_muldiv();
  63                         }
  64                 }
  65         }
  66 } PeepoptPass;
  67
  68 PRIVATE_NAMESPACE_END